Hello! I have here a Doctor Who book which takes place during the early part of the computer revolution, about the time the whole of what's discussed here happened. The people concerned in the book have machines running UNIX. Some of these are indeed PDP-11s and there are also a few DG Eclipses. Now the question: How difficult would it to port UNIX V7 from the usual machine, probably a PDP-11/43 (But I might be wrong about the model!) to a DG Eclipse? Naturally since I don't have physical hardware here, the intended target would be a SIMH DG virtual Eclipse (Or even a Nova 4) and the one doing all the work would be a SIMH PDP-11. -- Gregg C Levine hansolofalcon(a)worldnet.att.net "The Force will be with you. Always." Obi-Wan Kenobi